I just plunged this baby in 6 inches of snow and shot rooster tails 2 feet off all 4 wheels with Traxxas 8.4 NiMh Batteries. What a blast! Figured I would tell you about the build. There aren't many e-Maxx deWalt threads out there, figured that out after I started.
I wanted to try a DeWalt Motor upgrade like I have heard on Summit forums, and a few Emaxx's as well. Also, I noticed the electronics were not as good on most e-maxx's for sale (2056 servos, and AM radio, etc) so I bought a roller and upgraded it all to match my Summit and e-Revo.
I bought this e-Maxx roller on eBay for $210 with 4 runs on it and 2 custom painted bodies.
I bought 2 2075 Digital Waterproof servos on eBay for $30, 2.4 Link Radio for $50, DeWalt 14.4 Drill Motor (DeWalt motor; p/n: 396505-21) for $40 and used the EVX-2 out of my Summit, which now has a Mamba Monster in it, and bought a 22T pinion off of Kershaw Designs (had to have it that big to reach because you don't have much adjustment room. THIS MOTOR IS BIG!
NOTE: Make sure to cover DeWalt motor holes with tape before attempting 1 and 2, don't want shavings in there.
1. I had to take the stock brass pinion off of the DeWalt motor (had to take a Dremel cutting wheel to that) (don't have a pic of that)
2. I had to grind down two of the tabs on the DeWalt Motor to make it mount flush against the plate (could have used a washer but didn't need to after grinding down the tabs
3. I had to modify the aluminum motor mount plate holes because the DeWalt has screw holes that are further apart (I screwed the 5mm screws in, and put white finger nail polish on the bolts to figure out where they would need to be, and then drilled out the area). Also had to Dremel a little off the Transmission case to get the DeWalt to sit flat.
4. Had to flatten a spot on the stock shaft for the pinion set screw to adhere to
5. I painted the motor flat black so it wouldn't rust (used heat resistant paint from Advance Auto for exhaust)
6. Made motor leads by using crimp ends from Advance Auto Parts, Gold leads are 14 ga leads, stuffed 2 wires in there and crimped, and then got 16 ga bullet type leads for the other ends, crimped them on
7. I then installed the motor to the plate and reinstalled everything, added the servos and 2.4 radio
Finished Product Pictures
I had some major help from maxxnslash (http://www.rctech.net/forum/members/maxxnslash.html) on rctech.net forums, he answered a ton of questions and provided a modified motor plate picture.
I also referenced these threads in importance order...
DeWalt Motor (p/n: 396505-21)
22 Tooth Pinion from Kershaw Designs, Believe 21 would work as well
http://220.127.116.11/Pinions.htm (Large Steel Pinions, half way down)
Dan@kershawdesigns.com also offered to cut a custom motor plate for $40
Deans Ultra Wire from Tower Hobbies
58 Tooth Spur Gear
Advance Auto Parts
14 ga gold crimp leads
12 ga bullet crimp leads
High Def Gallery
Video coming soon...!
I have not added capacitors yet, it seemed to work ok without them for now. If anyone knows what they are for and if they are worth soldering on, let me know.